/******************************************************************************
*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
/**
*******************************************************************************
* @file
* ih264_resi_trans_quant.c
*
* @brief
* Contains function definitions single stage forward transform for H.264
* It will calculate the residue, do the cf and then do quantization
*
* @author
* Ittiam
*
* @par List of Functions:
* - ih264_resi_trans_quant_4x4()
* - ih264_resi_trans_quant_chroma_4x4
* - ih264_hadamard_quant_4x4
* - ih264_hadamard_quant_2x2_uv
* - ih264_resi_trans_quant_8x8
*
* @remarks
*******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
/* System include files */
#include <stddef.h>
/* User include files */
#include "ih264_typedefs.h"
#include "ih264_defs.h"
#include "ih264_size_defs.h"
#include "ih264_macros.h"
#include "ih264_trans_macros.h"
#include "ih264_trans_data.h"
#include "ih264_structs.h"
#include "ih264_trans_quant_itrans_iquant.h"
/**
*******************************************************************************
*
* @brief
* This function performs forward transform and quantization on a 4*4 block
*
* @par Description:
* The function accepts source buffer and estimation buffer. From these, it
* computes the residue. This is residue is then transformed and quantized.
* The transform and quantization are in placed computed. They use the residue
* buffer for this.
*
* @param[in] pu1_src
* Pointer to source sub-block
*
* @param[in] pu1_pred
* Pointer to prediction sub-block
*
* @param[in] pi2_out
* Pointer to residual sub-block
*
* @param[in] src_strd
* Source stride
*
* @param[in] pred_strd
* Prediction stride
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] u4_qbits
* QP_BITS_h264_4x4 + floor(QP/6)
*
* @param[in] pu2_threshold_matrix
* Pointer to Forward Quant Threshold Matrix
*
* @param[in] pu2_scale_matrix
* Pointer to Forward Quant Scale Matrix
*
* @param[in] u4_round_factor
* Quantization Round factor
*
* @param[out] pu1_nnz
* Total non-zero coefficients in the current sub-block
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ih264_resi_trans_quant_4x4(UWORD8 *pu1_src,
UWORD8 *pu1_pred,
WORD16 *pi2_out,
WORD32 src_strd,
WORD32 pred_strd,
const UWORD16 *pu2_scale_matrix,
const UWORD16 *pu2_threshold_matrix,
UWORD32 u4_qbits,
UWORD32 u4_round_factor,
UWORD8 *pu1_nnz,
WORD16 *pi2_alt_dc_addr)
{
UWORD32 i;
WORD32 x0, x1, x2, x3, x4, x5, x6, x7;
WORD32 i4_value, i4_sign;
UWORD32 u4_abs_value;
WORD16 *pi2_out_tmp = pi2_out;
UWORD32 u4_nonzero_coeff = 0;
for (i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
/* computing prediction error (residue) */
x4 = pu1_src[0] - pu1_pred[0];
x5 = pu1_src[1] - pu1_pred[1];
x6 = pu1_src[2] - pu1_pred[2];
x7 = pu1_src[3] - pu1_pred[3];
/* Horizontal transform */
x0 = x4 + x7;
x1 = x5 + x6;
x2 = x5 - x6;
x3 = x4 - x7;
pi2_out_tmp[0] = x0 + x1;
pi2_out_tmp[1] = (x3 <<1) + x2;
pi2_out_tmp[2] = x0 - x1;
pi2_out_tmp[3] = x3 - (x2<<1);
/* pointing to next row; */
pu1_src += src_strd;
pu1_pred += pred_strd;
pi2_out_tmp += 4;
}
pi2_out_tmp = pi2_out;
for (i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
/* Vertical transform and quantization */
x4 = pi2_out_tmp[0];
x5 = pi2_out_tmp[4];
x6 = pi2_out_tmp[8];
x7 = pi2_out_tmp[12];
x0 = x4 + x7;
x1 = x5 + x6;
x2 = x5 - x6;
x3 = x4 - x7;
/* quantization is done in place */
i4_value = x0 + x1;
if(i==0)
{
(*pi2_alt_dc_addr) = i4_value;
}
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], pu2_scale_matrix[0], u4_round_factor, u4_qbits, u4_nonzero_coeff);
pi2_out_tmp[0] = i4_value;
i4_value = (x3 << 1) + x2;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[4], pu2_scale_matrix[4], u4_round_factor, u4_qbits, u4_nonzero_coeff);
pi2_out_tmp[4] = i4_value;
i4_value = x0 - x1;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[8], pu2_scale_matrix[8], u4_round_factor, u4_qbits, u4_nonzero_coeff);
pi2_out_tmp[8] = i4_value;
i4_value = x3 - (x2 << 1);
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[12], pu2_scale_matrix[12], u4_round_factor, u4_qbits, u4_nonzero_coeff);
pi2_out_tmp[12] = i4_value;
pi2_out_tmp ++;
pu2_scale_matrix++;
pu2_threshold_matrix++;
}
/* Return total nonzero coefficients in the current sub block */
*pu1_nnz = u4_nonzero_coeff;
}
/**
*******************************************************************************
*
* @brief
* This function performs forward transform and quantization on a 4*4 chroma block
* with interleaved values
*
* @par Description:
* The function accepts source buffer and estimation buffer. From these, it
* computes the residue. This is residue is then transformed and quantized.
* The transform and quantization are in placed computed. They use the residue
* buffer for this.
*
* @param[in] pu1_src
* Pointer to source sub-block
*
* @param[in] pu1_pred
* Pointer to prediction sub-block
*
* @param[in] pi2_out
* Pointer to residual sub-block
*
* @param[in] src_strd
* Source stride
*
* @param[in] pred_strd
* Prediction stride
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] u4_qbits
* QP_BITS_h264_4x4 + floor(QP/6)
*
* @param[in] pu2_threshold_matrix
* Pointer to Forward Quant Threshold Matrix
*
* @param[in] pu2_scale_matrix
* Pointer to Forward Quant Scale Matrix
*
* @param[in] u4_round_factor
* Quantization Round factor
*
* @param[out] pu1_nnz
* Total non-zero coefficients in the current sub-block
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ih264_resi_trans_quant_chroma_4x4(UWORD8 *pu1_src,
UWORD8 *pu1_pred,
WORD16 *pi2_out,
WORD32 src_strd,
WORD32 pred_strd,
const UWORD16 *pu2_scale_matrix,
const UWORD16 *pu2_threshold_matrix,
UWORD32 u4_qbits,
UWORD32 u4_round_factor,
UWORD8 *pu1_nnz,
WORD16 *pu1_dc_alt_addr)
{
UWORD32 i;
WORD32 x0, x1, x2, x3, x4, x5, x6, x7;
WORD32 i4_value, i4_sign;
UWORD32 u4_abs_value;
WORD16 *pi2_out_tmp = pi2_out;
UWORD32 u4_nonzero_coeff = 0;
for (i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
/* computing prediction error (residue) */
x4 = pu1_src[0] - pu1_pred[0];
x5 = pu1_src[2] - pu1_pred[2];
x6 = pu1_src[4] - pu1_pred[4];
x7 = pu1_src[6] - pu1_pred[6];
/* Horizontal transform */
x0 = x4 + x7;
x1 = x5 + x6;
x2 = x5 - x6;
x3 = x4 - x7;
pi2_out_tmp[0] = x0 + x1;
pi2_out_tmp[1] = (x3 <<1) + x2;
pi2_out_tmp[2] = x0 - x1;
pi2_out_tmp[3] = x3 - (x2<<1);
/* pointing to next row; */
pu1_src += src_strd;
pu1_pred += pred_strd;
pi2_out_tmp += 4;
}
pi2_out_tmp = pi2_out;
for (i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
/* Vertical transform and quantization */
x4 = pi2_out_tmp[0];
x5 = pi2_out_tmp[4];
x6 = pi2_out_tmp[8];
x7 = pi2_out_tmp[12];
x0 = x4 + x7;
x1 = x5 + x6;
x2 = x5 - x6;
x3 = x4 - x7;
/* quantization is done in place */
i4_value = x0 + x1;
if(i==0)
{
*pu1_dc_alt_addr = i4_value;
}
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[0] = i4_value;
i4_value = (x3 << 1) + x2;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[4],
pu2_scale_matrix[4], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[4] = i4_value;
i4_value = x0 - x1;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[8],
pu2_scale_matrix[8], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[8] = i4_value;
i4_value = x3 - (x2 << 1);
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[12],
pu2_scale_matrix[12], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[12] = i4_value;
pi2_out_tmp ++;
pu2_scale_matrix++;
pu2_threshold_matrix++;
}
/* Return total nonzero coefficients in the current sub block */
*pu1_nnz = u4_nonzero_coeff;
}
/**
*******************************************************************************
*
* @brief
* This function performs forward hadamard transform and quantization on a 4*4 block
*
* @par Description:
* The function accepts source buffer and estimation buffer. From these, it
* computes the residue. This is residue is then transformed and quantized.
* The transform and quantization are in placed computed. They use the residue
* buffer for this.
*
* @param[in] pu1_src
* Pointer to source sub-block
*
* @param[in] pu1_pred
* Pointer to prediction sub-block
*
* @param[in] pi2_out
* Pointer to residual sub-block
*
* @param[in] src_strd
* Source stride
*
* @param[in] pred_strd
* Prediction stride
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] u4_qbits
* QP_BITS_h264_4x4 + floor(QP/6)
*
* @param[in] pu2_threshold_matrix
* Pointer to Forward Quant Threshold Matrix
*
* @param[in] pu2_scale_matrix
* Pointer to Forward Quant Scale Matrix
*
* @param[in] u4_round_factor
* Quantization Round factor
*
* @param[out] pu1_nnz
* Total non-zero coefficients in the current sub-block
*
* @returns
*
* @remarks
* None
*
*/
void ih264_hadamard_quant_4x4(WORD16 *pi2_src,
WORD16 *pi2_dst,
const UWORD16 *pu2_scale_matrix,
const UWORD16 *pu2_threshold_matrix,
UWORD32 u4_qbits,
UWORD32 u4_round_factor,
UWORD8 *pu1_nnz)
{
WORD32 i;
WORD32 x0,x1,x2,x3,x4,x5,x6,x7,i4_value;
UWORD32 u4_abs_value;
WORD32 i4_sign;
*pu1_nnz = 0;
for (i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
x4 = pi2_src[0];
x5 = pi2_src[1];
x6 = pi2_src[2];
x7 = pi2_src[3];
x0 = x4 + x7;
x1 = x5 + x6;
x2 = x5 - x6;
x3 = x4 - x7;
pi2_dst[0] = x0 + x1;
pi2_dst[1] = x3 + x2;
pi2_dst[2] = x0 - x1;
pi2_dst[3] = x3 - x2;
pi2_src += 4;
pi2_dst += 4;
}
/* Vertical transform and quantization */
pi2_dst -= SUB_BLK_WIDTH_4x4<<2;
for (i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
x4 = pi2_dst[0];
x5 = pi2_dst[4];
x6 = pi2_dst[8];
x7 = pi2_dst[12] ;
x0 = x4 + x7;
x1 = x5 + x6;
x2 = x5 - x6;
x3 = x4 - x7;
i4_value = (x0 + x1) >> 1;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]);
pi2_dst[0] = i4_value;
i4_value = (x3 + x2) >> 1;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]);
pi2_dst[4] = i4_value;
i4_value = (x0 - x1) >> 1;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]);
pi2_dst[8] = i4_value;
i4_value = (x3 - x2) >> 1;
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]);
pi2_dst[12] = i4_value;
pi2_dst ++;
}
}
/**
*******************************************************************************
*
* @brief
* This function performs forward hadamard transform and quantization on a 2*2 block
* for both U and V planes
*
* @par Description:
* The function accepts source buffer and estimation buffer. From these, it
* computes the residue. This is residue is then transformed and quantized.
* The transform and quantization are in placed computed. They use the residue
* buffer for this.
*
* @param[in] pu1_src
* Pointer to source sub-block
*
* @param[in] pu1_pred
* Pointer to prediction sub-block
*
* @param[in] pi2_out
* Pointer to residual sub-block
*
* @param[in] src_strd
* Source stride
*
* @param[in] pred_strd
* Prediction stride
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] u4_qbits
* QP_BITS_h264_4x4 + floor(QP/6)
*
* @param[in] pu2_threshold_matrix
* Pointer to Forward Quant Threshold Matrix
*
* @param[in] pu2_scale_matrix
* Pointer to Forward Quant Scale Matrix
*
* @param[in] u4_round_factor
* Quantization Round factor
*
* @param[out] pu1_nnz
* Total non-zero coefficients in the current sub-block
*
* @returns
*
* @remarks
* NNZ for dc is populated at 0 and 5th position of pu1_nnz
*
*/
void ih264_hadamard_quant_2x2_uv(WORD16 *pi2_src,
WORD16 *pi2_dst,
const UWORD16 *pu2_scale_matrix,
const UWORD16 *pu2_threshold_matrix,
UWORD32 u4_qbits,
UWORD32 u4_round_factor,
UWORD8 *pu1_nnz)
{
WORD32 x0, x1, x2, x3, x4, x5, x6, x7;
WORD32 i4_value, i4_sign, plane;
UWORD32 u4_abs_value;
for(plane = 0; plane < 2; plane++)
{
pu1_nnz[plane] = 0;
/* Horizontal transform */
x4 = pi2_src[0];
x5 = pi2_src[1];
x6 = pi2_src[2];
x7 = pi2_src[3];
x0 = x4 + x5;
x1 = x4 - x5;
x2 = x6 + x7;
x3 = x6 - x7;
/* Vertical transform and quantization */
i4_value = (x0 + x2);
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits,
pu1_nnz[plane]);
pi2_dst[0] = i4_value;
i4_value = (x0 - x2);
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits,
pu1_nnz[plane]);
pi2_dst[2] = i4_value;
i4_value = (x1 - x3);
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits,
pu1_nnz[plane]);
pi2_dst[3] = i4_value;
i4_value = (x1 + x3);
FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits,
pu1_nnz[plane]);
pi2_dst[1] = i4_value;
pi2_dst += 4;
pi2_src += 4;
}
}
/*
*******************************************************************************
*
* @brief
* This function performs Single stage forward transform CF8 and quantization on 8*8 blocks
* for h.264
*
* @par Description:
* Performs single stage 8x8 forward transform CF8 after calculating the residue
* The result is then quantized
*
* @param[in] pu1_src
* Input 8x8 pixels
*
* @param[in] pu1_pred
* Input 8x8 pixels
*
* @param[in] pi1_out
* Output 8x8 pixels
*
* @param[in] u4_thresh
* Threshold under which the coeffs are not quantized
*
* @param[in] u4_qp_div
* QP/6
*
* @param[in] u4_qp_rem
* QP%6
*
* @param[in] u2_src_stride
* Source stride
*
* @param[in] pred_strd
* stride for prediciton buffer
*
* @param[in] dst_strd
* stride for destination buffer
*
* @param[in] pu4_quant_mat
* Pointer to the 4x4 quantization matrix
*
* @returns Void
*
*
*******************************************************************************
*/
void ih264_resi_trans_quant_8x8(UWORD8 *pu1_src,
UWORD8 *pu1_pred,
WORD16 *pi2_out,
WORD32 src_strd,
WORD32 pred_strd,
const UWORD16 *pu2_scale_matrix,
const UWORD16 *pu2_threshold_matrix,
UWORD32 u4_qbits,
UWORD32 u4_round_factor,
UWORD8 *pu1_nnz,
WORD16 *pu1_dc_alt_addr)
{
WORD16 *pi2_out_tmp = pi2_out;
UWORD32 i;
WORD32 a0, a1, a2, a3, a4, a5, a6, a7;
WORD32 r0, r1, r2, r3, r4, r5, r6, r7;
WORD32 i4_sign;
UWORD32 u4_abs_value;
UWORD32 u4_nonzero_coeff = 0;
UNUSED(pu1_dc_alt_addr);
/*Horizontal transform */
/* we are going to use the a's and r's in a twisted way since */
/*i dont want to declare more variables */
for(i = 0; i < SUB_BLK_WIDTH_8x8; ++i)
{
r0 = pu1_src[0];
r0 -= pu1_pred[0];
r1 = pu1_src[1];
r1 -= pu1_pred[1];
r2 = pu1_src[2];r2 -= pu1_pred[2];
r3 = pu1_src[3];r3 -= pu1_pred[3];
r4 = pu1_src[4];r4 -= pu1_pred[4];
r5 = pu1_src[5];r5 -= pu1_pred[5];
r6 = pu1_src[6];r6 -= pu1_pred[6];
r7 = pu1_src[7];r7 -= pu1_pred[7];
a0 = r0 + r7;
a1 = r1 + r6;
a2 = r2 + r5;
a3 = r3 + r4;
a4 = a0 + a3;
a5 = a1 + a2;
a6 = a0 - a3;
a7 = a1 - a2;
pi2_out_tmp[0] = a4 + a5;
pi2_out_tmp[2] = a6 + (a7>>1);
pi2_out_tmp[4] = a4 - a5;
pi2_out_tmp[6] = (a6>>1) - a7;
a0 = r0 - r7;
a1 = r1 - r6;
a2 = r2 - r5;
a3 = r3 - r4;
a4 = a1 + a2 + ((a0>>1) + a0);
a5 = a0 - a3 - ((a2>>1) + a2);
a6 = a0 + a3 - ((a1>>1) + a1);
a7 = a1 - a2 + ((a3>>1) + a3);
pi2_out_tmp[1] = a4 + (a7>>2);
pi2_out_tmp[3] = a5 + (a6>>2);
pi2_out_tmp[5] = a6 - (a5>>2);
pi2_out_tmp[7] = (a4>>2) - a7;
pu1_src += src_strd;
pu1_pred += pred_strd;
pi2_out_tmp += 8;
}
/*vertical transform and quant */
pi2_out_tmp = pi2_out;
for (i = 0; i < SUB_BLK_WIDTH_8x8; ++i)
{
r0 = pi2_out_tmp[0];
r1 = pi2_out_tmp[8];
r2 = pi2_out_tmp[16];
r3 = pi2_out_tmp[24];
r4 = pi2_out_tmp[32];
r5 = pi2_out_tmp[40];
r6 = pi2_out_tmp[48];
r7 = pi2_out_tmp[56];
a0 = r0 + r7;
a1 = r1 + r6;
a2 = r2 + r5;
a3 = r3 + r4;
a4 = a0 + a3;
a5 = a1 + a2;
a6 = a0 - a3;
a7 = a1 - a2;
a0 = r0 - r7;
a1 = r1 - r6;
a2 = r2 - r5;
a3 = r3 - r4;
r0 = a4 + a5;
r2 = a6 + (a7>>1);
r4 = a4 - a5;
r6 = (a6>>1) - a7;
a4 = a1 + a2 + ((a0>>1) + a0);
a5 = a0 - a3 - ((a2>>1) + a2);
a6 = a0 + a3 - ((a1>>1) + a1);
a7 = a1 - a2 + ((a3>>1) + a3);
r1 = a4 + (a7>>2);
r3 = a5 + (a6>>2);
r5 = a6 - (a5>>2);
r7 = (a4>>2) - a7;
FWD_QUANT(r0, u4_abs_value, i4_sign, pu2_threshold_matrix[0],
pu2_scale_matrix[0], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[0] = r0;
FWD_QUANT(r1, u4_abs_value, i4_sign, pu2_threshold_matrix[8],
pu2_scale_matrix[8], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[8] = r1;
FWD_QUANT(r2, u4_abs_value, i4_sign, pu2_threshold_matrix[16],
pu2_scale_matrix[16], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[16] = r2;
FWD_QUANT(r3, u4_abs_value, i4_sign, pu2_threshold_matrix[24],
pu2_scale_matrix[24], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[24] = r3;
FWD_QUANT(r4, u4_abs_value, i4_sign, pu2_threshold_matrix[32],
pu2_scale_matrix[32], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[32] = r4;
FWD_QUANT(r5, u4_abs_value, i4_sign, pu2_threshold_matrix[40],
pu2_scale_matrix[40], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[40] = r5;
FWD_QUANT(r6, u4_abs_value, i4_sign, pu2_threshold_matrix[48],
pu2_scale_matrix[48], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[48] = r6;
FWD_QUANT(r7, u4_abs_value, i4_sign, pu2_threshold_matrix[56],
pu2_scale_matrix[56], u4_round_factor, u4_qbits,
u4_nonzero_coeff);
pi2_out_tmp[56] = r7;
pi2_out_tmp++;
pu2_scale_matrix++;
pu2_threshold_matrix++;
}
/* Return total nonzero coefficients in the current sub block */
*pu1_nnz = u4_nonzero_coeff;
}